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White mold

Sclerotinia sclerotiorum

2 host plants

Last updated

Data Coverage 3 of 6 dimensions
Causal Agent
Host Plants
Symptoms
Management
GDD Threshold
Regional Notes

Magnolia develops white mold when grown in poorly drained soils or with overhead irrigation. Plant in well-drained soil, avoid overhead watering, and space plants for air circulation. Remove and destroy infected plants. Do not compost diseased material. These preventive practices are your best defense.

Remove affected material as you find it and clean up any fallen debris where white mold spores can overwinter. Improve air circulation around susceptible plants through selective pruning. Avoid overhead irrigation during vulnerable growth periods. If the problem is persistent, your local Extension office can recommend current fungicide or bactericide options for your specific situation.

Quick Reference

Causal Agent
Sclerotinia sclerotiorum
Host Plants
2

Management

Cultural Controls

  • Plant in well-drained soils.
  • Avoid overhead irrigation.
  • Space plantings to improve air circulation, particularly around the base of the plants.
  • Remove and destroy infected plants.
  • Do not compost diseased plant materials.

Host Plants (2)